Cap closure



June 24, 1930. w. P. COHOE- CAP CLOSURE File d June 18, 1926 PatentedJune 24 1930 UNITED STATES PATENT OFFICE warmer: ra'rrnn conon, ormvEnnaLn-oN-rnn-nnnson, NEW YORK, assrenon 'ro WALLACE P. COHOE &COMPANY A CORPORATION OF NEW YORK car cLosunE Application filed June 18,

My invention relates to an improved form v of closure for sealing theopenings in bot- 'to the same. More particularly, the object of myinvention is to avoid the slow drying of the wet cap where the cap,being'made out of aflat disk, has, when formed therefrom, a thick bodyof the material at the turnedover edge, causing an accumulation ofmoisture therein which delays the drying of the cap unnecessarily. Afurther object is to apply a protective material to the skirt of the capso as to further diminish the amount of moisture to be removed therefromin the final drying of the cap. Further objects of my in-.

vention will appear from the detailed description of the samehereinafter.

While my invention is capable of being carried out in many differentways, by way of illustration-I have shown only one way of carrying outthe same in the accompanying drawings in which Figure 1 is a sideelevation of a milk bottle carrying a cap made in accordance with myinvention; and 4 Figure 2 is a vertical section through the same.

In the drawings I have shown a milk bottle 1 having an opening 2 at thetop of the same which is closed by a cap 3 having a depending skirt orflange portion 4 surrounding the edge of the mouth of the bottle. Itwill be noted thatethe depending flange or skirt 4 has at its lower edgea series'of serrations or indentations 5 to enable the cap to moreeffectively contract against the edge of the mouth of the bottle and,also, to prevent 1926. Serial No. 116,824.

the formation at this part of the cap, of a thickened portion of t disk,and, furthermore, to obviate as far as possible the accumulation ofmoisture at this point in the cap, which would be diflicult to remove.If desired, furthermore, I may impregnate or coat this part or the wholeof the cap 3 with a waterproofing material such as a waxy or resinousbody. When such waterproofin material is applied this is preferablyapphed merely to the skirt or flange 4 by-dipping the same into acomposition comprising ordinary rosin or colo hony in a fused condition,before the cap is applied to the bottle. Preferably, also, thewaterproofing material will have become e paper of the cap due to itshavlng been formed from a flat dry or hardbefore the cap has beenapplied to the bottle. Thereafter, the cap 3, which is made of paper,fiber, or similar material, will be coated either beforeitsapplicationto the bottle or after, and either on the inside or outside, or both,with an aque-' ous cellulose solution. The aqueous cellulose solution ispreferably a solution of viscose but may, if desired, be any otheraqueous solution of cellulose as, for example, a 011'- prammoniumsolution or a zinc chloride solution. Furthermore, it will'be understoodthat'the entire ca may-be so treated with the a ueous'cellu' osesolution, or only the depen ing portion 4 which surrounds the edge ofthe mouth of the bottle.- The cap 3, after havin had the aqueouscellulose solution applie as above, is applied to the bottle eitherbefore or after the said solution of cellulose has been coagulated byany one of the well-known methods. Thereupon, the film of aqueouscellulose solutionjvill contract and' cause the cylindrical portion ofthe cap to contract likewise. Asa result a tight closure of the bottle,or other container, is

effected -and this will retain the contents of' the milk undisturbed andfree from tampering until it reaches the ultimate consumer.

affected by water, however, in this condition,

it is desirable to subject it'to heat so that Inasmuch asthe aqueoussolution would be heating tool to the cap or around the edge of thesame, but especially over the skirt portion 4, said tool being heated toa temperature of at least 115 to 130 C. As a result, not only is thewaxy or resinous material molded to fit the neck of the bottle so as totend to hold the cap in position, but the aqueous cellulose solution, asa result of the heat, loses a suflicient amount of water to form a hornysubstance incapable ol?v thereafter bein aflfected b water. It will beunderstoo however, t at in the case where the waxy or resinous materialhas been applied to the skirt portion 4 of the cap it is desirable tohave the whole flange or skirt of the cap dipped in or coated by theaqueous cellulose solution in order to completely cover the waxy orresinous coating so as to prevent the waxy or resinous material fromadhering to the bottle and to the heating tool which is applied to theoutside of the same. Furthermore, it is to be understood that it 1sparticularly desirable, that where the waxy or resinous material hasbeen applled to the skirt portion 4 of the cap, to have the aqueouscellulose solution extend to a point at least above the upper edge ofthe coating of waterproofing material so as to completely enclose thesame and to obtain a good bond between the cellulose solution and thepaper of the cap. In any event it Wlll be understood that the serratededge 5 of the cap will have its serrations filled with the aqueouscellulose solution so that, as a result, the portion 4 of the cap isformed into a slltted contractual ring which grips the bottle and formsa tight closure therewith. The whole procedure materially shortens thetime required for completely applying the cap to the containers.

It will be understood, however, that, if deslred, 1n the case where thewaterproofing coatlng o f waxy or resinous material has been applled,the serrations 5 of the cap may be omitted, in which case the plasticskirt of the cap 1s molded to fit the bottle by the hot tool and thecellulosic coating prevents the reslnous plastlc material from stickingto the bottle or to the tool.

- Wlth this form of closure, in order to gain access to the bottle itwill be necessary to destroy the closure to a greater or less extent.

While I have described my inventionabove in detail I wish it to beunderstood that many changes may be made therein without departing fromthe spirit of the same.

I claim:

1. A container closure having a slitted engaging portlon coated with anaqueous cellulose solutlon extending between the slits therein thathas'been coagulated, said engaglng portlon belng contracted by thecellulose of the solution extending between the sllts to seal thecontainer.

2. A container closure having a slitted en'- gaging portion coated withan aqueous cel lulose solution extending between the slits therein thathas been coagulated and rendered partially anhydrous and horny incharacter so as to be unable to expand when wetted, said engagingportion being contracted by the cellulose of the solution extendingbetween the slits to seal the container.

' 3; A circular bottle cap having a slitted engaging portion coated withan aqueous cellulose solution extending between the slits therein thathas been coagulated, said engaging portion being contracted by thecellulose of the solution extending between the slits to seal thecontainer.

4. A circular bottle cap having a slitted engaging portion coated withan aqueous cellulose solution extending between the slits therein thathas been coagulated and rendered partially anhydrous and horny incharacter so as to be unable to expand when wetted, said engagingportion being contracted by the cellulose of the solution extendingbetween the slits to seal the container. 1

5. A container closure having a slitted engaging portion coated with aviscose solution extending between the slits therein that has beencoagulated, said engaging portion being contracted by the cellulose ofthe solution extending between the slits to seal the container.

6. A container closure having a slitted engaging portion coated with aviscose solution extending between the slits therein that has beencoagulated and rendered partially anhydrous and horny in character so asto be unable to expand when wetted, said engaging portion beingcontracted by the,cellulose of the solution extending between the slitsto seal the container.

7. A circular bottle cap having a slitted engaging portion coated with aviscose solution extending between the slits therein that has beencoagulated, said engaging portion being contracted by the cellulose ofthe solution extending between the slits to seal the contain- 8. Acircular bottle cap having a slitted engaging portion coated with aviscose solution extending between the slits therein that has beencoagulated and rendered partially anhydrous and horny in character so asto be unable to expand when wetter, said engaging portion beingcontracted by the cellulose of the solution extending between the slitsto seal the container.

9. A container closure having a slitted engaging portion coated with awaterproofing material and an aqueous cellulose solution extendingbetween the slits therein that has been coagulated, said engagingportion being contracted by the cellulose of the solution extendingbetween the slits to seal the container.

10. A container closure having a slitted engaging portion coated with awaterproofing material and an aqueous cellulose solution extendingbetween the slits therein that has been coagulated and renderedpartially anhydrous and horny in character so as to be unable to expandwhen wetted, said engaging portion being contracted-by the cellulose ofthe solution extending between the slits to seal the container.

11. A circular bottle cap having a slitted engaging portion coated witha waterproofing materialand an aqueous cellulose solution extendingbetween the slits therein that has been coagulated, said engagingportion being contracted by the cellulose of the solution extendingbetween the slits to seal the container.

12. A circular bottle cap having a slitted engaging portion coated witha waterproofing material and an aqueous cellulose solution extendingbetween the slits therein that has been coagulated and renderedpartially anhydrous and horny in character so as to be unable to expandwhen wetted, said engaging portion being contracted by the cellulose ofthe solution extending between the slits to seal the container.

13. A container closure having a slitted engaging portion coated with aWaterproofing material and a viscose solution extending between theslits therein that has been coagulated, said engaging portion beingcontracted by the cellulose of the solution extending between the slitsto seal the container.

14. A container closure having a slitted engaging portion coated with awaterproofing material and a viscose solution extend- .ing between theslits therein that has been coagulated and rendered partially anhydrousand horny in character so as to be unable to expand when wetted, saidengaging portion being contracted by the cellulose of the solutionextending between the slits to seal the container.

15. A circular bottle cap having a slitted engaging portion coated witha waterproofing material and a viscose solution extending between theslits therein that has been coagulated, said engaging portion beingcontracted by the cellulose of the solution extending between the slitsto seal the container.

16. A circular bottle'cap having a slitted engaging portion coated witha waterproofing material and a viscose solution extending between theslits therein that has been coagulated and rendered partiallyanhydrous'and horny in character so as to be unable to expand whenwetted,'said en agin portion being contracted by the cellulose o thesolution extending between the slits to seal the container.

In testimony that I claim the foregoing, I

have hereunto set my handthis 14th day of I June, 1926.

WALLACE PATTEN COHOE.

